Rolls for doubling and twisting machines



(No Model.) 2 SheetsSheet 1.-

J. N. LEONARD.

ROLLS FOR DOUBLING AND TWISTING MACHINES.

No. 483,809. Patented Oct. 4, 1 892.

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J. N. LEONARD.

ROLLS FOR DOUBLING AND TWISTING MACHINES.

No. 483,809 Patented O0t:4, 1892.

UNITED STATES PATENT OFFICE.

JOHN N. LEONARD, OF NORTHAMPTON, MASSACHUSETTS.

ROLLS FOR DOUBLING AND TWISTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 483,809, dated October4, 1892.

Application filed November 19, 1891. Serial No. 412,416. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN N. LEONARD, residing atNorthampton,in thecounty of Ham pshire and State of Massachusetts, have invented certainnew and useful Improvements in Rolls for Doubling and Twisting Machines,of which the following is a specification, reference being had thereinto the accompanying drawings.

This invention relates to doubling and twist ing threads or silk, andespecially to the rolls used therefor.

The object of the invention is to so improve the machine for doublingand twisting fibers, and especially silk, that there will be little orno tendency for the threads or fibers to catch and break near thedrawing and evening rolls.

Ina specification filed of even date herewith, to which reference ismade, I have described in a general way the method now pursued ofconveying threads from the spools to the cop, past the drawingandevening rolls, and certain improvements I have made therein. My presentimprovement is a modification thereof and the same general descriptionapplies hereto, this improvement being applicable to the same class ofmachines.

In the drawings, Figure l is a side elevation of my improved rolls andsupport, showing the course of the cord around the same. Fig. 1 is adetail of a modification. Fig. 2 is a top plan of the same. Fig. 3 is adiagrammatic detail showing the direction of the cord or thread aroundthe roll. Fig. 4 is an end elevation, partly in section, of so much of aspinningframe as is necessary to illustrate my invention.

Referring to the drawings, A denotes a bracket or support of any usualconstruction connected to the main frame of the machine. The lever B ispivoted in this bracket and is so connected to the stop device as toswing slightly on its pivot when any thread breaks, as is common in thisart, especially in the well-known Morrison machine. The lever B has afixed pivot or pintle O, which serves as an axle for grooved roll D, theroll being held on its axle by a screw E, entering the end of the axleor in any other suitable manner. A second lever F is hung to the end oflever b by a suitable pivot or hinge, so

that lever F may have a slight swing upward with reference to itssupporting-lever B; but preferably the joint will be rigid as against adownward movement. The lever F has a fixed pintle G, which forms theaxis for a second grooved roller H, the axes of the two rolls be ingparallel and their cylindrical faces being also parallel. The roll H maybe held on its shaft or pintle by a screw head K.

As the rollers D and H are supported on axes fixed at one end only totheir support- *ing-levers, the ends of these rolls away from the leversare easily accessible, so that threads or cords can be readily carriedround both rolls.

The rolls D and H are hung a little above a driving roll M, which rollis fixed to a shaft N, extending from end to end of the machine. Theroll M is something like a spool in form, having rings or flanges M M atits ends and being of reduced diameter between said ends.

The rollers D and II have rings D D and H H, aligning with the rings onthe driving roll and in position to rest thereon when held down bygravity, so that the rolls D and H shall be driven directly as byfriction from the driving-roll.

The faces of the rolls D and II between the rings referred to areprovided with grooves d d and 71 h, as many in number as desirable.

In cording up the rolls the cord or cords P, extending from a number ofspools and through suitable stop devices, will be carried under rollerD, resting in a groove 61, and thence under roller H, resting in thecorresponding groove h. Thence the cord is carried back over the top ofboth rollers and again under the bottom of both, the separate turns ofthe cord each resting in a groove in each wheel. Having passed thedesired number of times around both rollers, the cord is passed in thedirection of the thread T toward the spindle or cop. It is not very material which roller the thread leaves to go toward the cop. It is shownas passing away from the driving-roll after leaving roller D. As theconnection between levers B and F is jointed or yielding, the roller Hwill adjust itself to the surface of driving-roll M when dropped. Thejoint S may be so constructed, however, that the roller II will not bepermitted to drop onto the driving-roll by a mere change of the angle ofthe bearing-surfaces, as shown in Fig. l, in which case it will run asan idler and be rotated by the friction of the thread or cord P, passingaround it from the driven roll D. Of course either one of the rolls D Hmay be the idler.

The diagram Fig. 3 shows the general direction of the cord or threadaround the two rollers, and so toward the spindle.

The levers B and F constitute the frame to support the rolls D and H,and both these rolls can be lifted with the frame Without moving thedrivingroll.

What I claim is 1. The jointed frame having a spindle connected to eachpart thereof, the grooved roll on each spindle, and a driving-rollengaging one of the grooved rolls, in combination, sub

In testimony whereof I affix my signature in presence of two witnesses.

. JOHN N. LEONARD.

Witnesses:

S. BRAsHEARs, W. A. BARTLETT.

